Local Position Material Function failing to compile when Packaging for HTML5

After some extensive testing, I could not find any reason why the material function LocalPosition node was failing to compile and defaulting to the world grid material when Packaging for HTML5.

I asked the user on the original post to try a range of different engine versions and platforms when building for HTML5 and all produced the same result.

I have attached the logs, the project, and a screenshot of the compile error. I was unsure if this was really expected or not, so I decided to enter a bug to get the final verdict.

1. Download and Open the attached project.
2. Package for HTML5
3. Search Logs for shader compiler warning.

Outcome: Material Function Local Position fails to compile and defaults to World grid material.

Expected: Material compiles successfully without any warnings.

Is Material function call LocalPosition supported for HTML5 packaging?